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Finding the Fourth Proportional to 265,960.80, 399,200.40 and 132,991.20

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Solution

The fourth proportional to 265,960.80, 399,200.40 and 132,991.20 is: 199,616.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,960.80 : 399,200.40 = 132,991.20 : x
  2. Step 2: Convert to fraction form
    265,960.80/399,200.40 = 132,991.20/x
  3. Step 3: Cross multiply
    265,960.80x = 399,200.40 × 132,991.20
  4. Step 4: Simplify right side
    265,960.80x = 53,090,140,236.48
  5. Step 5: Solve for x
    x = 53,090,140,236.48/265,960.80
  6. Step 6: Final answer
    x = 199,616.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.